In the result, we hold that the petitioner is entitled to be paid interest @ 12% in respect of the amount of Rs. 6,33,800/- for the period from 27.12.2006 to 24.05.2011 and a writ of mandamus directing the payment of the interest is accordingly issued. The respondent shall pay the interest within a period of six weeks from today. The writ petition is allowed in the above terms. No costs.